Pneumatic action for self-playing musical instruments.



M. SFWRIGHT.

PNEUMATIC ACTION FOR SELF PLAYING MUSICAL INSTRUMENTS. APPLICATION FILEDIULY 25, I9I4.

1,21 8,1 50. 1 Patented Mar. 6, 1917.

a}. 1 I 4 SHEETS-SHEET 1- if I I as, wot/M 0:

m: "an": runs cc. rnovwumm. nusmncmn. n. c.

Qwuamtoz: I

M. s. WRIGHT.

PNEUMATIC ACTION FOR SELF PLAYING MUSICAL INSTRUMENTS. APPLICATION FILEDJULY 25, L9H.

1,218,150. r 1 Patented 11 111917.

4 SHEETS-SHEET 2.

M. S. WRIGHT.

PNEUMATIC ACTION FOR SELF PLAYING MUSICAL INSTRUMENTS.

APPLICATION FILED JUL Y25, 1914. 4 I

1 ,21 8,1 50. Patented Mar. 1917.

ii 4 SHEETS-SHEET 3.

J6 v J2 55 x 33 yfim 48 2 1 f L 6 58 4:9 MI 7 46' 5) 7 avwemtoz: I

M. S. WR IGHT.-

PNEUMATIC ACTION FOR SELF PLAYING MUSICAL INSTRUMENTS.

APPLICATION FILED JULY 25 I914.

Patented Mar. 6,1917.

4 SHEETS-SHEET 4- ERS CO. PNOTO4LHN0. WASNINGION. D C I UNITED STATESPATENT orrion MORRIS S. WEIGHT, OF WORCESTER, MASSACHUSETTS.

PNEUMATIC ACTION FOR SELF-PLAYING MUSICAL INSTRUMENTS.

Specification of Letters Patent.

"Patented. Mar. 6, 1917.

Application filed July 25, 1914. Serial No. 852,987.

positioned on the instrument, and wherein the several parts may be morereadily removed bodily from the instrument without the necessity ofdismantling the various other parts of the action.

Another object of the invention is to provide a novel construction andarrangement of the several parts, comprising the pneumatic action, witha view to reducing the number of parts and otherwise simplifying theconstruction, rendering the same more compact, reducing the cost ofproduction, and rendering the same highly efiicient and durable in use.

Although various embodiments are with in the contemplation and spirit ofthe invention, the improvements have to deal, more particularly, withwhat are classed in the art as metal actions for musical instruments,and among the various features of the invention may be mentioned animproved type of oppositely disposed wind chest parts or headers, and aseries of interposed vacuum casings, with novel means for supporting thelatter in position whereby the same, with the associated valve andpneumatic mechanism may be bodily removed as desired.

Another improvement of the invention includes a novel construction andarrangement of valve casing, a primary pneumatic, and a motor pneumatic,both of said pneumatics being operatively connected with the valvecasing.

Further, the invention includes a new and improved type of vacuumchamber casing, the same being preferably positioned on the side of thevalve casing, and underlying the movable wall of the motor pneumatic,for a substantial distance, and afiording a support and abutment forsaid movable wall in the outward position of the latter.

Again, the invention embodies novel means of connection between thevacuum chamber casing and the valve casing, said connection being of acharacter to permit of the body removal of the valve chamber casing andconnected primary pneumatic from the vacuum "chamber casing.

Another feature of the invention resides in the provision of novel valveconstruction, permitting the same to be readily adjusted as occasiondemands without the necessity of removing any of the parts of theinstrument. This is an important characteristic of the invention, since,after the parts are assembled, it often becomes necessary to adjust thevarious valve parts, and to obtain good results and the proper toneeffect, this adjustment must, of necessity, be exceedingly accu ate. Thepresent invention provides a simple means of accomplishing this resultin a very efficient manner.

Satill further, the invention embraces a vent chamber casing, of novelconstruction and means whereby access may be readily had to the interiorof the chamber for cleansing purposes, or for application andreplacement of vent caps, etc.

Also, the invention includes, in combination, a novel construction andarrangement-of primary pneumatic, motor pneumatic, valve casing, andvacuum chamber casing, operatively connected and associated one with theother, whereby the various parts may be readily detached from the wallof the vacuum chamber casing, for removal and replacement, withoutremoving the vacuum chamber casing from the headers.

Other and further improvements and novel details of the construction andarrangement of parts will be referred to and readily understood from thedescription to follow when considered. in connection with theaccompanying drawings, forming a part hereof, and wherein I havedisclosed, for the purpose of illustration, a convenient andsatisfactoryembodiment of the invention.

In the drawings Figure 1 is a fragmentary front elevation ofmyinvention,

Fig. 2 is a top plan view of the same;

Fig. 3 is an enlargedsectional view of one of the pneumatic actions;

Fig, 3 is a detail section of one of the 13 fit valve stem sections withthe adjusting cap and valve mounted thereon;

Fig. 1 is a section taken on line H of F ig. 1;

Fig. 5 is a plan view of one of the vacuum chamber casings and motorpneumatic, and valve casing positioned on one of the header members, thelatter being in section;

Fig. 6 is a side elevation of the same, the header being shown inelevation;

Fig. 7 is a section on line 77 of Fig. 6;

Fig. 8 is a section on line 88 of same figure;

Fig. 9 is a detail view of the air conduit;

Figs. 10, 11, 12, 13, 11, 15, and 16 are detail views of valve partsenlarged;

Fig. 17 is a modified construction of valve casing positioned upon thevacuum chamber casing, the parts being shown in vertical section;

Fig. 18 is a cross section of the same;

Fig. 19 is a cross sectional view of another modified construction ofvalve casing, positioned on the vacuum chamber casing;

Fig. 20 is a vertical section of a slightly modified form of valvecasing and vacuum chamber casing, the vacuum chamber casing having anupwardly projecting wall for supporting the motor pneumatic as well asthe valve casing, and

Fig. 21 is a transverse section of the same.

With more particular reference to the drawings, wherein like referencenumerals refer to corresponding parts throughout the several views,oppositely disposed wind chest parts or headers are provided, the samebeing substantial duplicates, and a. description of one will suflice forthe other.

The said headers are preferably of metal and comprise an elongatedvertically extending, tubular casing 1, having horizontally extendingtubular branches 1 (see Fig. 1) forming therebetween receiving pocketsor spaces 1", for the reception of vacuum chamber casings projectingbetween the oppositely disposed headers, one in each of the spaces l Theuppermost branch 1 of the headers has a forward extension 2 forming asupport for a vent chamber casing, extending from header to header, andalso to be described hereinafter.

The vertically extending tubular portions 1 of the headers have aremovable rear plate 3, thereby affording access to the interior of thetubular member 1 as well as to the interior of the branches 1, forcleansing purposes, etc.

A removable plate 3 is removably secured to the headers at the frontthereof whereby to bridge the spaces 1 between the branches of theheaders when in position, and whereby to permit of access to the vacuumchamber casings, when it is desired to assemble or remove the latter.

It being understood that a series of vacuum chamber casings areprovided, the same being arranged in superimposed relation, andextending from header to header, and supported in the space between thebranches 1 of the headers, a description of one of the said vacuumchamber casings will be sufficient. This also applies with regard to theprimary pneumatics, valve mechanism, and motor mechanism positioned uponthe vacuum chamber casings, it being understood that a series of each ofthese cooperating parts is positioned on each vacuum chamber casing,with the parts on the respective vacuum chamber casings arranged instaggered relation or out of vertical alinement, as clearly illustratedin Fig. 1 of the drawings.

The vacuum chamber casings comprise a bottom wall 1, a front wall 5, atop wall 6, the latter inclining from its point of connection with thefront wall 5 in a downward direction toward the rear thereof andterminating at its rear edge in a flange 7 secured in any desired mannerto the bottom wall 4. The vacuum chamber casing is preferably of sheetmetal construction, and as previously stated, is of a length to extendfrom header to header and to accommodate a plurality of pneumatic units.

A combined pneumatic and valve casing is provided in operativeassociation with the vacruun chamber, and is preferably constructed asfollows S is a substantially cup-shaped metallic bottom wall of apneumatic, having about the periphery thereof bendable fingers 9,adapted to be bent over into engagement with the upper surface or topwall 10, of the pneumatic element. 11 is a flexible diaphragm with theedges thereof interposed between the top and bottom walls 10, and 8,respectively, and 12 is an interposed washer or gasket. Projectingupwardly from the top wall 10 and preferably an integral extensionthereof, is a substantially cylindrical valve section 13, having anannular inwardly projecting top flange 14., upon which is positioned asubstantially cylindrical valve section 15 having an inwardly projectingannular flange 16, of a size to be bent over the edge of the flange 11,of the lower valve section, and overlie the under surface of'said flangewhereby to interlock the valve sections 13 and 15. The valve casing,made up of the sections above described, is adapted to be connected tothe side wall of the vacuum chamber, and in order that these parts maybe firmly supported in position on the vacuum chamber casing, a. portionof the side wall of the valve casing section 13 is preferably flattenedas indicated at 17. This flat surface affords an extended hearing toengage the flat surface of the front wall 5 of the vacuum chamber, andin order to removably secure these parts together, I preferably providea metallic strap member 18, curved to project about the wall of theeasing 18, and terminating in offset feet 19, parallel to the front wall5 of the vacuum chamber. 20 are bolts secured to and projectingforwardly from the front wall 5 and adapted to be engaged by threadednuts, the heads 21 of which are adapted to overlie the offset feet 19,as illustrated, more particularly in Fig. 8, and the reduced terminals22 of which have a slotted-way to be engaged by a screw driver or thelike, to the end that when the bolts are applied, they will serve toengage the feet 19 of the straps 1S, and thereby maintain the valvecasing in air tight engagement with the wall of the vacuum chamber. Thefront wall 5 of the vacuum chamber casing and the adjacent wall 17 ofthe valve chamber have communicating openings, as illustrated at 23, andif desired, a leather or other suitable packing 24 may be interposedbetween the valve casing, and the adjacent wall of the vacuum chambercasing, it being understood in this connection, of course, that saidyieldable packing has an aperture in registration with the apertures 23just referred to.

The valve mechanism includes a valve rod the same engaging a cushion, asof felt, 26, secured to a disk, of leather, 27, pasted or otherwisesecured to the diaphragm 11. The valve rod 25 has secured to the upperend thereof a valve disk 28 adapted to seat upon a felt or otherpacking, 29, positioned on the inwardly projecting flange 16 at thelower end of the upper valve sectioru Overlving the valve disk 28 is thehead 30, of the rod 25, forming a support for an adjustable rod 31.which may be termed an extension of the valve rod. The extension 31 ispreferably threaded to the member 30, and has a flattened head 82.Positioned on the extension 31 is a valve member, preferably comprisinga metallic disk 33 having an offset extended central portion 34 havingopposed flattened walls to receive therebetween the flattened head 32 ofthe member 31. ,The disk 33 has a loose or floating engagement with thehead 32 of the valve stem, whereby to readily engage its seat. Sleevedupon the extension 34. to engage the disk part 83 is a suitable disk, asof leather, 35, and positioned upon said leather disk is a disk, as offelt. 36, adapted to contact with an inwardly and downwardlv projectingflange or valve seat, 37, of a cap member 38, having a peripheral flange39 to overlie the upper edge of the valve section 15. Interposed betweenthe upper edge of the valve section 15 and the inner surface of the capmember 38 is a suitable packing as felt, 40. The disk shaped members 28and 35 preferably have about the periphery thereof extensions 28 and 85respectively, as illustrated more particularly "in Figs. 13 and 14,whereby to loosely engage the inner surface of the valve casing and formguides for the valve memhere, in their sliding movement, and, to, at thesame time, form between the guide extensions, air passages.

The time element in the closing of the valves is an essentialconsideration, and it is of the utmost importance that the same be of acharacter to permit of ready and accurate" adjustment, and that this maybe accomplished after the parts are assembled in the instrument withoutthe necessity of dismantling any of the valve parts. It will be seenthat by imparting a rotary movement to the member 84, which is exteriorof the valve casing the rod'81 is rotated to the end that the upper andlower valve members may be relatively adjusted, as desired, in anaccurate manner, and without removing any of the parts of the valveconstruction.

A suitable vent chamber preferably takes the form of a metallic tubularcasing 44 of I a length to extend from header to header, and beingremovably positioned upon, and secured to the forward extensions 2 ofthe topmost branches 1 of saidheaders. The adjacent walls of saidextensions and vent chamber have connecting openings 44 and aninterposed packing of suitable material 45 may be provided. The bottomwall of said vent chamber is provided with a series of openings 44spaced longitudinally throughout the same and adapted for connection onewith each of the primary pneumatics, the said pneumatics of therespective vacuum chamber casings being laterally spaced from oneanother. A tubular conduit 46, preferably of metal, projects outwardlyand upwardly from the bottom wall of the primary pneninatics, and asimilar tubular conduit 47 projects downwardly from the vent chamber,the conduit 47 being relatively short whereby to offer no obstruction tothe removability of the vacuum chamber casings with their associatedparts, as will presently appear. A convenient form of coupling memberpreferably comprises a tube or sleeve, 48, overlying the adjacent endsof the conduits 46 and 47, the sleeve being preferably formed of metaland having a yieldable lining, as rubber, 49, whereby to frictionallyengage the walls of said conduits. To take up for slight variation inthe size of the tubes, I preferably provide annular beads 49 adjacentopposite ends of the sleeve 48, which form internal the vent chambercasing has a series of openings one for each conduit and in registrationtherewith. A closure for said openings conveniently comprises a block orplate 52, and an attached packing member 53, the plate preferablyextending from end to end of the vent chamber, and removably secured tothe top wall thereof as by swinging arms 54, rotatably supported at 55to the frame work or casing X. The arms 54: are conveniently bowed, asillustrated, whereby in the swinging movement thereof to .engage over abow spring arm 56 secured at one end 5'? to the closure block and havinga pin and slot engagement 58*- at its opposite end to permit ofyieldable movement. This closure affords an air tight seal for the ventchamber.

The secondary or motor pneumatic is preferably also detachably mountedupon the valve casing, the same having an upper stationary wall 58having an inclined bottom surface 59 to the rear end of which ispivoted, at 60, a lower movable wall 61 hav ing connected thereto in anydesired manner, abracket 62 for connection with a strike bar member ofany of the approved types.

The walls 58 and G1 are connected one to the other at the sides and freeend by flexible folds 63, and the inclined upper surface 6 of the vacuumchamber extending a substantial distance over the bottom wall 61 of themotor pneumatic provides means for limiting the downward movement of thelower wall of the pneumatic, thereby protecting the pivotal connection,and, at the same time, affording a substantial support or rest for thelatter in its lower position. Likewise, this relative arrangement andclose association of vacuum chamber casing and motor pneumatic serve torender the device more compact.

The end of the wall 58 has a curved or segmental part 61- adapted to fitabout the periphery of the valve casing 15, and mount ed upon saidcurved portion of the wall is a suitable packing, as of leather, 65. Ametallic strap 66 engaging about the periphery of the valve casing hasoffset feet (37, adapted to connect with that portion of the end of thewall 58, at opposite sides of the curved portion. Suitable screws 68projecting through the feet 67 and engaging the ends of the wall 58,serve to retain the motor pneumatic in position, and if desired,

vertically extending anchoring bars 69, conveniently of brass, may bepositioned in the wall 58 to be engaged by the ends of the screws 68 tothereby more firmly hold the parts in position. The side of the valvecasing 15 has a suitable opening 70, adapted to communicate with anopening 70 in the end of the wall 58 of the motor pneumatic, whichopening leads to the chamber formed between the walls 58 and 61 at apoint intermediate the ends of the walls 58.

As previously stated, the vacuum chamber casings are supported betweenthe branches 1 of the headers, the lower wall of the vacuum chambercasing being provided with an opening 70 communicating with an opening70 in the abutting upper wall of said header branches. An interposedpacking 71 is interposed between the said abutting walls. The lower wallof said header branches is preferably inclined as illustrated at 1 andengaging plates 72 are secured to the upper wall of the vacuum chambercasing at a point below said inclined surface, and said platespreferably incline in an opposite direction to the inclined surface ofthe header branches. Suitable wedge blocks as of metal 73 withoppositely inclined surfaces engage between the said inclined surfacesof the vacuum casing and header branch, one side of the wedge blockhaving a transverse engaging rib H adapted to firmly engage the wall ofthe header branch and to permit ready removal of the wedge block whendrawn outwardly. To prevent accidental removal of the wedge blocks,adjustable abutment screws 75 are provided, the same being adapted toengage the plate 3 when the latter is in place.

The construction of the apparatus is believed to be clear to thoseskilled in the art from the above description, and accompanyingdrawings, it being understood that minor changes may be made in detailsof construction and arrangement of parts without departing from thespirit or principle of operation of the invention.

The operation of the apparatus may be reviewed as follows As theperforations of the music sheet pass over the usual channels in thetracker bar the vacuum below the diaphragm 11 of the primary pneumaticis relieved, and the diaphragm elevated, so as to unseat the lower valvemember, and at the same time seat the upper valve member to the end thatdirect communication is established between the vacuum chamber and motorpneumatic through the passageway afforded by the channels between theprojections 28 of said lower valve member. This will tend to immediatelycollapse the motor pneumatic and cause the striker bar to actuate thekey. In the continued movement of the music sheet the vacuum below thediaphragm will he restored, thereby imparting a reverse movement to thevalve, the lower valve being seated, and the upper valve unseated,whereby to establish communication between the motor pneumatic and theoutside through the channels between the projections of the upper valvemember. This will cause the movable wall 61 of the mot-or pneumatic tomove downwardly into contact with the support provided by the upper wallof the vacuum chamber 'casin".

Should it be desired to remove the primary pneumatic attachment, thebendable fingers 9 are disengaged from the wall 10, and the tubing 16separated from the tubing 47 by a sliding movement of the couplingsleeve 48. Should it be desired to remove the valve casing together withthe connected pneumatics, this may be readily accom plished by releasingthe retaining strap or band 18, as previously described. Also the motorpneumatic may be readily separated without detachment of any of theother parts by releasing the retaining band 66. The valve parts may bereadily removed from the casing .without separation of the latter fromits attaching parts, by removing the cap 38. Also the valve membersproper may be readily adjusted from without the valve casing by engagingthe part 34: of the upper valve member and imparting rotary movementthereto, which, according to the direction of rotation, will lengthwiseadjust the valve rod at a point intermediate the upper and lower valvemembers, to

separate or bring the valve disks toward each other.

Access may be readlly had to the 1nter1or of the vent chamber casing, byremoving Cir the closure member, 52, and in this'way the interior of thechamber may be cleansed, the vent caps removed and replaced, as desired,etc.

Should it be desired to detach the vac uum chamber casings, this isaccomplished by removing the front plate 3 of the headers, and thenreleasing the wedge blocks 73, when the vacuum chamber casings may hebodily removed from their supports on the header branches 1 With moreparticular reference to Figs. 17 and 18, it will be seen that theprimary pneumatic A is of substantially the same construction as theprimary pneumatic of the views previously described, whereas the valvecasing B is substantially rectangular in cross section beingconveniently an integral extension of the top wall C of the primarypneumatic. In this construction the valve parts are constructed asbefore, but the valve casing is preferably of a single part, and theseat for the lowermost valve is conveniently provided by a flangedabutment D, soldered or otherwise secured to the wall of the valvecasing intermediate its ends. The rectangular formation of valve casingaffords a flat side to abut against the side wall of the diaphragmcasing, E, and the valve casing is conveniently secured in place, as bya strap F, projecting around the valve casing and having offset feet G,secured as by screws H to said vacuum chamber casing.

The projections I on the valve disk which constitute guides arepreferably arranged, as illustrated in Fig. 18, whereby they may engagethe corners of the casing. In this embodiment of my invention, thestraps for securing the motor pneumatic would be the same as in thepreviously described construction, with the exception that the samewould be substantially U-shaped rather than curved.

In Fig. 19 I have also illustrated a modified construction of valvecasing, the parts being similar to the construction illustrated in Fig.3, with the exception that instead of forming the round tubular valvecasing with a flattened side to engage the flat side of the vacuumchamber casing, the tubular valve casing is provided on its rear sidewith standards or legs J, having flat surfaces to engage the vacuumchamber casing, and be held in place as by screws K.

Conveniently, a packing L is interposed between the legs J and theadjacent wall of the vacuum chamber casing M.

A further embodiment of the invention is illustrated in Fig. 20, and inthis construction, the vacuum chamber casing N has secured thereto awall 0, projecting upwardly' above the vacuum chamber casing. This wall0 is utilized as a support for the motor pneumatic P, the same beingremovably secured preferably by screws Q. The valve casing, in thisembodiment of the invention, is preferably of substantially the sameconstruction as the valve casing illustrated in Figs. 17 and 18, but inthis embodiment of the invention, it will be appreciated that thesecuring straps, as previously illustrated, for passing around the valvecasing and supporting the pneumatic thereto may be dispensed with.

A securing strap R, however, is utilized for supporting the valve casingto the vacuum chamber casing, as by screws S. In each of the modifiedembodiments of the invention, above illustrated, it will be appreciatedthat the valve casing communicates through its side with the abuttingside wall of the vacuum chamber casing, and it will also be seen thatthe valve casing with the primary pneumatic may be readily removed fromboth the vacuum chamber casing and the motor pneumatic, as desired,should it be necessary to bodily detach any of. these parts.

In the claims, wherein I refer to valve disks or similar term, the sameis used in a broad sense as applying to the cooperating valves in thevalve casing, whether these disks are of solid integral construction ormade up of a plurality of parts such as yieldable packings, reinforcingmetal backings, etc, and also wherein I refer to the valve rod, thisterm is not to be construed in a limited sense in that one or both ofthe valve rod sections 25 and 31 may be included by this term.

1. In a pneumatic'action for musical instruments, the combination ofoppositely disposed metallic hollow headers having horizontally disposedtubular branches, of metallic vacuum chamber casings projecting betweenthe headers with the ends thereof supported between adjacent branches ofthe headers, a primary pneumatic and valve casing supported on suchvacuum chamber casing, and said vacuum chamber casings with thesupported primarypneumatic and valve casing being bodily removable fromthe headers.

2. In a pneumatic action for musical instruments, the combination ofoppositely disposed metallic hollow headers having horizontally disposedtubular branches, of metallic vacuum chamber casings projecting betweenthe headers with the ends thereof supported between adjacent branches ofthe headers, a valve casing supported upon the vacuum chamber casing, aprimary pneumatic, and a motor pneumatic operatively associated withsaid valve casing and means for removably retaining said vacuum chambercasing in place whereby the same, with the valve casing and pneumatics,may be bodily removed from the headers.

3. In a pneumatic action for musical instruments, the combination ofoppositely disposed metallic hollow headers having horizontally disposedtubular branches, of metallic vacuum chamber casings projecting betweenthe headers with the ends thereof sup ported between adjacent branchesof the headers, and means for retaining the vacuum chamber casing inplace comprising a retaining block interposed between the vacuum chambercasing and the adjacent wall of one of said branches.

I. In a pneumatic action for musical in struments, the combination ofoppositely disposed metallic hollow headers having horizontally disposedtubular branches, of metallic vacuum chamber casings projecting betweenthe headers with the ends thereof supported between adjacent branches ofthe headers, and means for retaining the vacuum chamber casing in placecomprising a retaining wedge shaped block interposed between the vacuumchamber casing and the adjacent wall of one of said branches.

In a pneumatic action for musical instruments, the combination ofoppositely disposed metallic hollow headers having horizontally disposedtubular branches, of metallic vacuum chamber casin s projecting betweenthe headers with the ends thereof supported between adjacent branches ofthe headers, and means for retaining the vacuum chamber casing in lacecomprising a wedge shaped block interposed between one side of thevacuum chamber and the adjacent side of one of the header branches, thesaid sides being inclined in opposite directions.

6. In a pneumatic action for musical instruments, the combination ofoppositely disposed metallic hollow headers having horizontally disposedtubular branches, of metallic vacuum chamber casings projecting betweenthe headers With the ends thereof supported between adjacent branches ofthe headers, a metallic valve casing supported upon the vacuum chambercasing, a primary pneumatic carried by the valve casing, the. saidprimary pneumatic and valve casing being removable from the vacuumchamber casing and the vacuum chamber casing with the primary pneumaticand valve casing being removable from the headers.

7. In a pneumatic action for musical instruments, the combination ofoppositely disposed metallic hollow headers having horizontally disposedtubular branches, of metallic vacuum chamber casings projecting betweenthe. headers with the ends thereof supported between adjacent branchesof the headers, a valve casing supported upon the vacuum chamber casing,a primary pneumatic operatively associated with the 'alvo casing, amotor pneumatic operatively associated with the valve casing, the vacuumchamber casing with said pneumatics and valve casing being removabletogether from the headers.

S. In a pneumatic action for musical instruments, the combination ofoppositely disposed metallic hollow headers having horizontally disposedtubular branches, of metallic vacuum chamber casings projecting betweenthe headers with the ends thereof supported between adjacent branches ofthe headers, a valve casing supported upon the vacuum chamber casing, aprimary pnehmatic operatively associated with the valve casing, a motorpneumatic operatively associated with the valve casing, the vacuumchamber casing with said pneumatics and valve casing being removabletogether from the headers, and said pneumatics and valve casing beingthemselves removable from one another.

9. In a pneumatic action for musical instruments, the combination ofoppositely disposed hollow headers having horizontally disposed tubularbranches, of vacuum chamber casings projecting between the headers withthe ends thereof supported between adjacent branches of the headers, aprimary pneumatic and valve casing supported on such vacuum chambercasing, and said vacuum chamber casings with the supported primarypneumatic and valve casing being bodily removable from the headers.

10. In a pneumatic action for musical instruments, the combination ofoppositely dis posed hollow headers having horizontally disposed tubularbranches, of vacuum chamber casings projecting between the headers withthe ends thereof supported between adj acent branches of the headers, avalve cas ing supported upon the vacuum chamber casing, a primarypneumatic operatively associated with the valve casing, a motorpneumatic operatively associated with the valve casing, the vacuumchamber casing with said pneumatics and valve casing being removabletogether from the headers, and said pneumatics and valve casing beingremovable from the vacuum chamber casing.

11. In a pneumatic action for musical instruments, the combination of anelongated vertically disposed header having horizontally disposedbranches, of a vacuum chamber casing, arranged between said branches andresting upon the wall of one of said branches, and retaining meansinterposed be tween said vacuum chamber casing and the wall of anotherof said branches.

12. In a pneumatic action for musical instruments, the combination of anelongated vertically disposed header having horizontally disposedbranches, of a vacuum chamber casing arranged between said branchesandresting upon the wall of one of said branches, and retaining meansinterposed between said vacuum chamber casing and the wall of another ofsaid branches, said branches being separated from one another by anunobstructed space at the front ends thereof whereby to permit thevacuum chamber casing to be bodily removed from the front of the header.

13. In a pneumatic action for musical instruments, the combination of anelongated vertically disposed header having horizontally disposedbranches, of a vacuum chamber casing, arranged between said branches andresting upon the wall of one of said branches, and retaining meansinterposed between said vacuum chamber casing and the wall of another ofsaid branches, and valve and pneumatic mechanism mounted upon the vacuumchamber casing.

14L. In a pneumatic action for musical instruments, the combination ofan elongated Vertically extending tubular header having horizontallyextending branches, of avacuum chamber casing arranged between saidbranches, said casing being adapted to rest upon a lower branch, and aretaining wedge interposed between the adjacent upper branch and saidvacuum chambercasing, the said branches being separated from one anotherby a substantially unobstructed space at the front of the header topermit the vacuum chamber casing to be removed, a housing plate bridgingthe space between the branches of the header at the front thereof, andan abutment member on said wedge block adapted to engage said plate toretain the wedge block in place.

' 15. In a pneumatic action for musical instruments, the combination ofan elongated vertically disposed header having horizontally disposedbranches, of a vacuum chamber casing, arranged between said branches andresting upon the wall of one of said branches, retaining meansinterposed between said vacuum chamber casing and the wall of another ofsaid branches, a primary pneumatic and valve mechanism operativelyconnected with the vacuum chamber casing, a vent chamber casing, aconduit establishing communication between the primary pneir matic andvent chamber casing, said vent chamber being in communication with oneof the branches of the header, and a removable wall for the vent chambercasing permitting access to said conduit.

16. In a pneumatic action for musical instruments, the combination of anelongated vertically disposed header having horizontally disposedbranches, of a vacuum chamber casing arranged between said branches andresting upon the wall of one of said branches, retaining meansinterposed between said vacuum chamber casing and the wall of another ofsaid branches, a primary pneumatic and valve mechanism operativelyconnected with the Vacuum chamber casing, a vent chamber casing, aconduit establishing communication between the primary pneumatic andvent chamber casing, said vent chamber casing being in communicationwith one of the branches of the header, a connection between saidconduit and the tracker board, one wall of said vent chamber casinghaving an opening in registration with said conduit, and a removableclosure for said opening.

17. In a device of the character described, the combination of ahorizontally disposed vacuum chamber casing, a vertically disposed valvecasing communicating therewith, a horizontally disposed motor pneumaticoperatively associated with the latter, the motor pneumatic having alower movable wall and the upper wall of the vacuum chamber casinginclining downwardly toward the outer end of the movable pneumatic wallwhereby to constitute an abutment and support for said movable wall whenthe latter is in expanded position, a header having horizontallydisposed superimposed branches extending transversely relative to thevacuum chamber casing, one at each side thereof, one of said branchesbeing in communication with said vacuum chamber casing, and supportingmeans interposed between said vacuum chamber casing and the other branchof the header.

18. In a device of the character described, the combination of ahorizontally disposed vacuum chamber casing, a vertically disposed valvecasing communicating therewith,

a horizontally disposed motor pneumatic operatively associated with thelatter, the motor pneumatic having a lower movable wall and the upperwall of the vacuum chamber casing inclining downwardly toward the outerend of the movable pneumatic wall whereby to constitute an abutment andsupport for said movable wall when the latter is in expanded position, aheader having tubular branches, said branches being in communicationwith said vacuum chamber casing, and supporting means interposed betweensaid vacuum chamber casing and one of the branches of the header, an airvent chamber casing supported upon one of said branches and incommunication therewith, and a primary pneumatic operatively associatedwith the vacuum chamber casing and having communication with the airvent chamber.

19. In a device of the character described, the combination of ahorizontally disposed vacuum chamber casing, a vertically disposed valvecasing communicating therewith, a horizontally disposed motor pneumaticoperatively associated with the latter, the motor pneumatic having alower movable wall and the upper wall of the vacuum chamber casinginclining downwardly toward the outer end of the movable pneumatic wallwhereby to constitute an abutment and support for said movable wall whenthe latter is in expanded position, a header having horizontallydisposed branches in communication with the headers, one of saidbranches being in communication with said vacuum chamber casing, andsupporting means interposed between said vacuum chamber casing and theother branch, an air vent chamber casing supported upon one of saidbranches and in communication therewith, a primary pneumatic operativelyassociated with the vacuum chamber casing and having communication withthe air vent chamber, and a removable cover for said vent chambercasing.

'20. In a device of the character described, the combination of ahorizontally disposed vacuum chamber casing, a vertically disposed valvecasing communicating therewith, a horizontally disposed motor pneumaticoperatively associated with the latter, the motor pneumatic having alower movable wall and the upper wall of the vacuum chamber casinginclining downwardly toward the outer end of the movable pneumatic wallwhereby to constitute an abutment and support for said movable wall whenthe latter is in expanded position, a header having horizontallydisposed tubular branches extending transversely relative to the vacuumchamber casing at each side thereof, one of said branches being incommunication with the vacuum chamber casing and constituting a rest forsaid casing, and a wedge shaped block interposed between the oppositeside of said vacuum chamber casing and the other of said tubularbranches.

21. In a pneumatic action for musical instruments, the combination of aheader having a series of horizontally disposed tubular branchesarranged in spaced horizontal relation, a horizontally extending vacuumchamber casing arranged between each adj acent pair of branches andsupported therefrom, a 'alve casing and primary pneumatic positionedupon each vacuum chamber casing at the side thereof, and a motorpneumatic secured to each valve casing and overlying the adj acentvacuum chamber casing.

22. In a pneumatic action for musical instruments, the combination of aheader having a series of horizontally disposed tubular branchesarranged in spaced horizontal relation, a horizontally extending vacuumchamber casing arranged between each adjacent pair of tubular branchesand supported therefrom, a valve casing and primary pneumaticpositionedupon each vacmun chamber casing at the side thereof, and amotor pneumatic secured to each 'alve casing and having a movable walloverlying the adjacent vacuum chamber casing, the superimposed valve andpneuinatic mechanism of each vacuum chamber casing being arranged out ofvertical alinement.

23. In a pneumatic action for musical instruments, the combination of aplurality of horizontally disposed tubular supports arranged in spacedvertical relation, a horizontally extending vacuum chamber casingarranged between the supports, a valve casing and primary pneumaticpositioned upon the vacuum chamber casing at the side thereof, and amotor pneumatic secured to said valve casing and having a movable walloverlying the vacuum chamber casing, an elongated horizontally disposedvent chamber casing arranged above and extending substantially parallelto the vacuum chamber casing, a conduit extending from the primarypneumatic to the vent chamber casing and communicating with the interiorthrough one wall thereof. an opposite wall of the vent chamber casinghaving an opening therein in registration with the end of the conduitleading from the pri mary pneumatic to the vent chamber, and a removablecover plate adapted to be positioned on said open wall.

2a. In a pneumatic action for musical instruments, the combination of aheader, a series of horizontally disposed tubular casings incommunication therewith and arranged in spaced horizontal relation, ahorizontally extending vacuum chamber casing arranged between eachadjacent pair of air casings and supported therefrom, a valve casing andprimary pneumatic positioned upon each vacuum chamber casing at the sidethereof, and a motor pneumatic secured to each valve casing andoverlying the adjacent vacuum chamber casing, an elongated horizontallydisposed vent chamber easing arranged above and extending substantiallyparallel to the vacuum chamber casings, conduits extending from eachprimary pneumatic to the vent chamber casing and communicating with theinterior through one wall thereof, an opposite wall of the vent chambercasing having a series of openings one for each of said conduits and inline therewith, a plate adapted to cover all of said openings, and handreleasable retaining means for said plate.

25. In a pneui'natic action, a horizontally disposed vent chamber casinghaving in its top and bottom walls a series of openings, those in thetop wall being substantially in line with those in the bottom Wall, aseries of primary pneumatics, tubular conduits extending from saidpneumatics, and communicating at the opposite end one with each of thebottom openings of the vent chambercasing, and a cover overlying the topwall of the vent chamber casing.

26. In a pneumatic action, a horizontally disposed vent chamber casinghaving in its top and bottom walls a series of openings, those in thetop wall being in substantial vertical alinemcnt with those in thebottom wall, a series of primary pneumatics, tubular conduits extendingfrom said pneumatics, and communicating at the opposite end one witheach of the bottom openings of the vent chamber casing, vent caps fittedto the opening of the bottom of the vent chamber casing, a removablecover for that wall of the vent chamber casing having the opening, and amovable arm adapted to engage said cover and force the same in air tightengagement with the wall of the vent chamber casing. I

'27. In a pneumatic action for musical instruments, the combination of ahorizontally disposed vacuum chamber casing, a valve casing andpneumatic mechanism operatively connected thereto, and supporting meansfor said vacuum chamber casing comprising a vertically disposed tubularheader, horizontal tubular extensions from said header, one at each sideof the vacuum chambercasing, the vacuum chamber casing and one of saidtubular extensions having registering openings, and removable means formaintaining said vacuum chamber casing in place between said tubularextensions.

In a pneumatic action for musical instruments, the combination of ahorizontally disposed, vacuum chamber casing, a valve casing andpneumatic mechanism operatively connected thereto, and supporting meansfor said vacuum chamber casing comprising a vertically disposed tubularheader, horizontal tubular extensions header, one at each side of thevacuum chamber casing, the vacuum chamber casing and one of said tubularextensions having regis tering openings, removable means for maintain ngsaid casing in pla e bet een said from said i tubular extensions,comprising a metallic Wedge shaped block interposed between one wall ofthe vacuum chamber casing and the adjacent wall of the header branch.

29. In a pneumatic action for musical instruments, the combination of ahorizontally disposed vacuum chamber casing, a valve casing andpneumatic mechanism operatively connected thereto, and supporting meansfor said vacuum chamber casing comprising a vertically disposed tubularheader, horizontal tubular extensions from said header, one at each sideof the vacuum chamber casing, the vacuum chamber casing and one of saidtubular extensions having regisstruments, the combination of oppositelydisposed hollow headers having horizontally disposed tubular branches,vacuum chamber casings projecting between the headers with the endsthereof supported between adjacent branches of the headers, and aprimary pneumatic and valve casing supported upon each vacuum chambercasing.

81. In a pneumatic action for musical instruments, the combination ofoppositely disposed vertically arranged'hollo-w headers havinghorizontally disposed tubular branches, vacuum chamber casingsprojecting between the headers with the ends thereof sup ported upon thebranches of the headers and in communication therewith, a valve casingsupported upon the vacuum chamber casmg, a primary pneumatic, and amotor pneumatic, both of said p'neumatics being operatlvely associatedwith the valve casing, and means for removably retaining said vacuumchamber casing in place.

32. In a pneumatic musical instrument, the combination of a pneumaticelement, a casing, and means for establishing communication betwecn thepneumatic element and casing comprising a tubular conduit connected withthe casing, a tubular'conduit connected with the pneumatic, a flexiblesleeve bridging the space between the conchute and overlying the wall ofeach conduit, and a rigid sleeve overlying the flexible sleeve and of alength to extend over both conduits, and said rigid sleeve having aspaced internal annular projection to force the flexible sleeve inholding engagement with said conduits.

33.111 a. pneumatic action for musical instruments, the combination ofoppositely disposed vertically arranged hollow headers havinghorizontally disposed tubular branches, vacuum chamber casingsprojecting between the headers with the ends thereof supported upon thebranches of the head ers, and means for removably retaining each vacuumchamber casing in place.

3+. In a pneumatic action, the combination of a valve casing, apneumatic element operatively associated therewith, an air chambercasing, a conduit leading from the pneumatic element, a conduit leadingfrom the air casing, means for connecting said conduits comprising atube of rigid material sleeved upon the respective conduits at theiradjacent ends, and annular beads adjacent opposite ends of the said tubeforming internal projections.

35. In a pneumatic action, the combination of a valve casing, apneumatic element operativcly associated therewith, an air chambercasing, a conduit leading from the pneumatic element, a conduit leadingfrom the air casing, means for connecting said conduits comprising atube of rigid material sleeved upon the respective conduits at theiradjacent ends, and annular beads adjacent opposite ends of the said tubeforming internal projections, and a yieldable lining for said tubeextending substantially from end to end, and adapted to be forcedinwardly at separated points by said beads.

36. In a device of the character described, the combination of ahorizontally disposed vacuum chamber casing having a flat side wall, avertically disposed sheet metal valve casing, said casing beingsubstantially cylindrical in cross section, and means for securing saidvalve casing to said fiat side of the vacuum chamber casing, whereby toprevent twisting or turning action of the valve casing relative to thevacuum chamber casing, said means including a flattened portion at oneside of the cylindrical metallic wall to abut against the flattened edgeportion of the vacuum chamber casing, and retaining means operativelyconnected with said valve casing and vacuum chamber casing.

37. In a pneumatic action for musical instruments, the combination ofoppositely disposed vertically arranged hollow headers havinghorizontally extending tubular branches, of a vacuum chamber casingprojecting between the headers, and between the branches, said vacuumchamber casing having in one surface an opening adapted to register withan opening in one of said branches, and retaining means interposedbetween the opposite surface of said vacuum chamber casing and anotherbranch of the header.

38. In a device of the character described,

the combination of a metallic valve casing having a substantiallycylindrical vertical wall with a flattened surface, a pneumaticoperatively associated withthe valve casing, a horizontally disposedvacuum chamber casing arranged at the side of the valve casing andhaving a vertical side wall in contact with the flattened surface of thevalve casing, the abutting portions of the casings having registeringopenings, a yieldable washer interposed between said abutting surfaces,and a retaining band projecting around the substantially cylindricalportion of the vertical wall of the valve casing and having a detachableengagement with the vacuum chamber casing.

39. In a device of the character described, the combination of anelongated metallic vacuum chamber casing, a metallic valve casing, saidvalve casing being substantially cylindrical, and means for detachablysecuring the same to one wall of the vacuum chamber casing comprising acurved band extending around the valve casing, and adapted at its freeends to be connected with the said wall of the vacuum chamber casing.

10. In a device of the character described, the combination of ahorizontally disposed vacuum chamber casing having a vertical wall, avertically disposed metallic valve casing, and means for securing thevalve casing to the vertical wall of the vacuum chamber casingcomprising a curved band on the valve casing, said band having offsetfeet to engage the vertical wall of the vacuum chamber casing, andreleasable securing means for said feet.

41. In a device of the character described, a horizontally disposedvacuum chamber casing having a vertical substantially fiat wall, a.vertically disposed substantially cylindrical valve casing having aflattened side portion to engage said back wall of the vacuum chambercasing, the two casings having communicating openings, and means forsecuring the casings together comprising a band projecting around thewall of the valve casing and contacting with the wall of the vacuumchamber casing, and means for securing the ends of the band to thevacuum chamber casing, whereby the valve casing may be independentlyremoved from the vacuum chamber casing at will.

42. In a device of the character described, a horizontally disposedvacuum chamber casing having a vertical substantially flat back wall, avertically disposed substantially cylindrical valve casing having aflat-- tened side portion adjacent its base to engage said back wall ofthe vacuum chamber casing, the two casings having communicating openingsand means for securing the casings together comprising a band projectingaround the Wall of the valve casing, means for securing the ends of theband to the vacuum chamber casing, and a horizontally disposed pneumaticelement supported upon the upper end of the valve casin 43. In a deviceof the character described, a horizontally disposed vacuum chambercasing having a vertical substantially flat back wall, a verticallydisposed substantially cylindrical valve casing having a flattened sideportion adjacent the lower end thereof to engage said back wall of thevacuum chamber casing, the two casings having communicating openings,and means for securing the casings together comprising a bandprojecting'around the wall of the valve casing and means for-securingthe ends of the band. to the vacuum chamber casing, a horizontallydisposed pneumatic element supported upon the valve casing above thevacuum chamber casing, and a motor pneumatic sup ported from said valvecasing above the vacuum chamber casing.

a l. In a device of the character described, the combination of avertically disposed valve casing having an opening intermediate itsends, a horizontally disposed vacuum chamber casing having a rear sideopening adapted to register with the opening in the valve casing, andmeans for securing the valve casing to said rear side of the vacuumchamber casing, a primary pneumatic and a motor pneumatic supported onthe valve casing, the said valve casing and the said pneumatics beingindependently detachable from the vacuum casing.

45. In a device of the character described, the combination of avertically disposed valve casing, a pneumatic supported thereon, thevalve casing having an opening intermediate its ends, a horizontallydisposed vacuum chamber casing having an opening communicating with theopening in the valve casing, and means for detachably connecting thevalve casing to the vacuum chamber casing, comprising threaded boltsprojecting from the wall of the v vacuum chamber casing, nuts threadedto said bolts and having retaining caps, and means associated with thevalve casing adapted to be engaged by the retaining caps of the nuts.

4-6. In a device of the character described, the combination of adiaphragm pneumatic element having a bottom wall and a top wall, saidtop wall having a metallic tubular proj ecti on forming a casingsection, the outer end of said projection having an inwardly extendingannular flange, a cooperating metallic tubular valve casing sectionhaving at its lower end an inwardly projecting annular flange adapted torest upon the first mentioned flange, and having an interlockingengagement therewith, said flanges forming a valve seat, a cap for theouter end of the cooperating valve casing section having a valve seat, adiaphragm in the pneumatic chamber, a valve rod actuated thereby, andvalves on the rod to alternately engage said valve seats.

47. In a device of the character described, the combination of apneumatic element having a bottom wall and a top wall, said top wallhaving a metallic tubular projection forming a valve casing section, theouter end of said projection having an inwardly extending annularflange, a coopegting metallic tubular valve casing section having at itsinner end an inwardly projecting annular flange adapted to rest upon thefirst mentioned flange and having an interlocking on gagement therewith,said flanges forming a valve seat, a vacuum chamber casing in communication with the first mentioned valve casing section, and a motorpneumatic in communication with the cooperating valve casing section.

48. In a device of the character described, the combination of apneumatic element having a bottom wall and a top wall, said top wallhaving a metallic tubular projection forming a valve casing section, theouter end or" said projection having an inwardly extending annularflange, a cooperating metallie tubular valve casing section having atits inner end an inwardly projecting annular flange adapted to rest uponthe first mentioned flange and having an interlocking engagementtherewith, said flanges forming a valve seat, a vacuum chamber casing,means for connecting the same directly to the first mentioned valvecasing section, a motor pneumatic and means for connecting the samedirectly to the cooperating valve casing section.

49. In a device of the character described, the combination of apneumatic element having a bottom wall, and a top wall, said top wallhaving a metallic tubular projection forming a valve casing section, theouter end of said projection having an inwardly tending annular flange,a cooperating metallic tubular valve casing section having at its innerend an inwardly projecting annular flange adapted to rest upon the firstmentioned flange and having an interlocking engagement therewith, saidflanges forming a valve seat, a vacuum chamber casing, means fordetachably connecting the same directly to the side wall of the firstmentioned valve casing section, a motor pneumatic, and means fordetachably connecting the samedirectly to the side wall of thecooperating valve casing section.

50. In a device of the character described, the combination of a valvecasing having a tubular wall and spaced valve seats, a pneumaticoperatively associated with the valve casing, the valve casing having anopening intermediate its ends whereby to establish communication withsaid pneumatic, and end openings, and a reciprocating valve in the valvecasing adapted to alternately engage said seats whereby to alternatelyestablish-communication between the pneumatic and said end openings,said valve being of less diameter than that of the valve chamber andhaving separated guide projections thereon to contact with the tubularwall of the valve casing.

51. In a device of the character described, the combination of a valvecasing having a tubular wall and spaced valve seats, a pneumaticoperatively associated with the valve casing, the valve casing having anopening intermediate its ends whereby to establish communication withsaid pneumatic, and end openings, a pneumatically controlledreciprocating valve rod in the valve casing, separated valve disks onthe rod to alternately engage the valve seats, said disks being of lessdiameter than that of the valve casing, and having an annular series ofspaced extensions forming guides in engage ment with the wall of saidvalve casing.

In a pneumatic action for musical instruments, the combination ofoppositely disposed hollow headers having horizontally disposed tubularbranches, of vacuum chamber casings projecting between the headers withthe ends thereof supported between adj acent branches of the headers,said vacuum chamber casings being in communication with one of saidbranches, and a detachable retaining means interposed between saidvacuum chamber casings and another of said branches.

53. In a pneumatic action for musical instruments, the combination ofoppositely disposed vertically extending hollow headers havinghorizontally disposed branches, of vacuum chamber casings, projectingbetween the headers with the ends thereof supported between adjacentbranches of the headers, and a wedge-shaped block interposed between onewall of the vacuum chamber casings and one of said branches to maintainthe vacuum chamber casings in contact with another of said branches.

5i. In a pneumatic action for musical instruments, the combination ofoppositely disposed hollow headers arranged vertically and havinghorizontally disposed tubular branches, of vacuum chamber casingsprojecting between the headers with the ends thereof supported betweenadjacent branches of the headers, a metallic valve casing supported uponeach vacuum chamber casing, a primary pneumatic carried by the valvecasing, and means for detachably supporting the vacuum chamber casing inplace.

In a pneumatic action for musical iiistruments, the combination ofoppositely disposed metallic hollow headers arranged vertically andhaving horizontally disposed tubular branches, of a vacuum chambercasing projecting between the headers with the ends thereof supportedbetween adjacent branches of the headers, and in communication with oneof said branches, a valve casing removably supported upon the vacuumchamber casing, a primary pneumatic operatively associated with thevalve casing, and a motor pneumatic detachahly supported upon the valvecasing.

56. In a pneumatic action for musical instruments, the combination of anelongated vertically extending tubular header having horizontallyextending branches, of a vacuum chamber casing arranged between saidbranches, the said branches being separated from one another by asubstantially unobstructed space at the front of the header to permitthe vacuum chamber casing to be removed, means for removably supportingsaid vacuum chamber asing in place, and a movable housing plate bridgingthe space between the branches of the header at the front thereof.

57. In a device of the character described, the combination of a valvecasing having a tubular wall and spaced valve seats, a pneumaticoperativcly associated with the valve casing, the valve casing having anopening intermediate its ends whereby to establish communication withsaid pneumatic, and end openings, at pneumatically cont-rolledreciprocating valve rod in the valve casing, separated relativelyadjustable valve disks on the rod to alternately engage the valve seats,one of said disks having an engaging part projecting without the casingwhereby to relatively adjust the valve disks.

58. In a device of the character described, the combination of a valvecasing having a tubular wall and spaced valve seats, a pneumaticoperatively associated with the valve using, the valve casing having anopening intermediate its ends whereby to establish communication withsaid pneumatic, and end openin s, a pneumatically controlledreciprocating valve rod in the valve casing, separated valve disks onthe rod to alternately engage the valve seats, and said valve rod beinglengthwise adjustable intermediate said valve disks, one of said valvedisks being loosely positioned upon the 'alve rod and having anoperative engagement therewith whereby to lengthwise adjust the same andalso having an engaging part projecting through an opening in the valvecasing.

59. In a device of the character described, the combination of a valvecasing having a tubular wall and spaced valve seats, a pneumaticoperatively associated with the valve I casing, the valve casing havingan opening intermediate its ends whereby to establish communication withsaid pneumatic, and end openings, a pneumatically controlledreciprocating valve rod in the valve casing,

separated valve disks on the rod to alternately engage the valve seats,said rod having a threaded engagement with one of said valve disks andterminating in a flattened. head, and the other of said valve diskshaving a cap extension loosely mounted upon said flattened head, wherebya turning movement of said cap imparts a turning movement to said rod,and thereby relatively adjusts the valve disks.

60. In a device of the character described, the combination of ahorizontally disposed vacuum chamber casing, a vertically disposed valvecasing communicating tierewith, and a horizontally disposed. motorpneumatic operatively associated with the latter, the motor pneumatichaving a lower movable wall and the upper wall of the vacuum chambercasing extending a substantial distance under the lower surface of saidmovable pneumatic wall, arranged so as to be contacted thereby, wherebysaid vacuum chamber casing constitutes a support for the latter.

61. In a device of the character described, the combination of ahorizontally disposed vacuum chamber casing, a vertically disposed valvecasing communicating therewith, and a horizontally disposed motorpneumatic operatively associated with the latter, the motor pneumatichaving a lower movable wall and the upper wall of the vacuum chambercasing being adjacent to and inclining downwardly toward the outer endof the movable pneumatic wall whereby to constitute an abutment andsupport for said movable wall when the latter is in expanded position.

62. In a device of the character described, a pneumatic having an upperstationary wall and a lower movable wall with flexible foldstherebetween, the stationary wall having an inclined lower surface andan end opening through theuppcr wall to a point intermediate its endswhere it communicates with the interior of the pneumatic, the lowermovable wall being pivoted adjacent the open end of the stationary wall,a vacuum chamber casing arranged adjacent to and below the movable wallof the pneumatic, said casing having an upper wall inclining downwardlyfrom the point of connection of the movable wall whereby to provide asupport for the movable wall of the pneumatic in its expanded position,and valve mechanism operatively associated with the vacuum chamher andpneumatic. 1

(33. In a device of the character described,

a pneumatic having an upper stationary wall and a lower movable wallwith flexible folds therebetween, the stationary wall having aninclined'lower surface and an end opening through the upper wall to apoint intermediate its ends where it communicates with the interior ofthe pneumatic, the lower movable wall being pivoted adjacent the openend of the stationary wall, a vacuum chamber casing arranged below andadacent to the movable wall of the pneumat c, said casing having anupper wall inclining downwardly from the point of connection for themovable wall whereby to provide a support for the movable wall of thepneumatic in its expanded position, and valve mechanism operativelyassociated with the vacuum chamber and pneumatic, said pneumatic andvacuum chamber casing being independent and the valve mechanism beingdetachable from each of these members.

64. In a device of the character described, the combination ofoppositely disposed vertically arranged headers having spacedhorizontally extending supporting parts, a plurality of vacuum chambercasings projecting between the headers and supported one between eachadjacent pair of said horizontally extending supporting parts, and incommunication with the headers, and means for independently detachablysecuring each vacuum chamber casing in place.

65. In a device of the character described, the combination of a Vacuumchamber casing, a pneumatic, a vent chamber casing, a conduit betweenthe vent chamber casing and tracker bar, a connection between the ventchamber casing and vacuum chamber casing, a conduit leading from thevent chamber casing to the pneumatic, the wall of said vent chambercasing having an opening for permitting access to the interior thereof,and a closure for said opening, said closure being removable independentof said conduit.

66. In a device of the character described, the combination of a primarypneumatic casing, an air vent casing, a conduit leading from saidprimary pneumatic to said vent chamber casing, a vent cap interposed.between said conduit and the interior of the vent chamber casing, thewalls of the air casing having an opening in registration with saidconduit and vent cap for access to said parts, a closure for the openingremovable independently of the walls of the vent casing, and a conduitestablishing communication between said vent chamber casing and thetracker bar. i

67. In a device of the character described, the combination of a primarypneumatic casing, an air ventcasing, a conduit leading from said primarypneumatic to said vent chamber casing, and connecting with one wallthereof, a removable vent cap interposed between said conduit and theinterior of the vent chamber casing, the opposite wall of the air casinghaving an opening in alinement with the conduit and vent cap, aremovable closure for the opening, said closure being independent of thewalls of the vent casing, and a conduit for establishing communicationbetween said first mentioned conduit and the tracker bar.

68. In a device of the character described, the combination of a primarypneumatic casing, an air casing, a conduit leading from said pneumaticto the air casing, a removable vent cap frictionally held in position atthe end of the conduit in the casing, and the wall of the casing havingan opening opposite the vent cap and of a size to permit the entrance ofthe vent cap therethrough, and a removable closure for the o 'iening,said closure being mounted upon and independently removable from thelast mentioned wall of the air casing.

(39. In a device of the character described, the combination of aprimary pneumatic casing, an air casing, a conduit leading from saidpneumatic to the air casing, a removable vent cap frictionally held inposition at the end of the conduit, and the wall of the casing having anopening opposite the vent cap of a size to permit the entrance andremoval of the vent cap therethrough, a removable closure for theopening, and a packing interposed between the wall of the air casing andsaid closure.

70. In a pneumatic action for musical instruments, the combination of anelongated vertically disposed tubular header having horizontallyextending branches, of a vacuum chamber casing arranged between saidbranches and resting upon the wall of one of said branches, a primarypneumatic and valve mechanism operatively connected with the vacuumchamber casing, a vent chamber casing, a conduit establishingcommunication between the primary pneumatic and vent chamber casing,said vent chamber being in communication with one of the branches of theheader and a removable wall for the vent chamber casing permittingaccess to said conduit.

71. In a pneumatic action for musical instruments, the combination of ahorizontally disposed vacuum chamber casing, a motor pneumatic arrangedabove the vacuum chamber casing, a cylindrical valve casing arranged tothe side of the vacuum chamber casing and overlying the end wall of themotor pneumatic, said valve casing being in communication with thevacuum chamber casing, and with the motor pneumatic, means fordetachably supporting the valve casing to the vacuum chamber casing andindependent means for detachably supporting the valve casing to the endwall of the motor pneumatic, and a primary pneumatic carried by thevalve casing.

7 2. In a pneumatic action for musical instrument-s, the combination ofa valve casing, a pneumatic element, a valve stem section in the valvecasing operatively associated with the pneumatic element, said casinghaving a valve seat, and a valve having a cap mounted on the top of thestem section and adapted in the action of the pneumatic to engage saidseat, said valve being ai'laptcd to tilt in diflerent directionsrelative to the stem section while fixed against rotary movement, andsaid stem section having a thread ed support at its lower end wherebythe position of the valve may be adjusted by rotary movement of saidcap.

73. In a pneumatic action for musical instrmnents, the combination of avalve casing, a pneumatic element, a lengthwise adjustable valve stem inthe valve casing operatively associated with the pneunu'it-ic element,said stem having a flattened head at one end and a valve having arecessed part to loosely engage over said head, the parts beingconstructed and arranged whereby the valve is prevented from relativerotary movement while permitting relative rocking movement.

74. In a pneumatic action for musical i11- struments, the combination ofa valve casing, a pneumatic element, a lengthwise adj ustable valve stemin the valve casing operatively associated with the pneumatic element,and a floating valve positioned on said valve stem and mounted to yieldin different directions relative to said stem, and peripheralprojections on the valve to engage the inner surface of the valve casingto constitute guides for the valve.

75. In a pneumatic action for musical instruments, the combination of atubular valve casing, an open end wall for the valve casing,constituting a valve seat, a pneumatic element operatively associatedwith the valve casing, a lengthwise adjustable valve stem operativelyassociated with the pneumatic and actuated thereby, and a valve diskhaving av central cap portion projecting upwardly therefrom to engagethrough the open end wall of the valve casing, said cap portion of thevalve disk being movab'ly positioned on the valve stem.

7 6. In a pneumatic action for musical instruments, the combination of atubular valve casing, an open end wall for the valve casing,constituting a valve seat, a pneumatic element operatively associatedwith the valve casing, a valve stem operatively associated with thepneumatic and actuated thereby, said valve stem being lengthwiseadjustable by rotary movement thereof, and a valve disk having a centralcap portion projecting upwardly therefrom to project through the openend wall of the valve casing, said cap portion of the valve disk beingloosely positioned on the end of the valve stem, the parts beingconstructed and arranged whereby to permit relative rocking movement andprevent relative rotary movement between the valve disk and valve stem.

7 7 In a pneumatic action for musical instruments, the combination of atubular valve casing an open end wall for the valve casing, constitutinga valve seat, a pneumatic element operatively associated with the valvecasing, a valve stem operatively associated with the pneumatic andactuated thereby, said valve stem being lengthwise adjustable by rotarymovement thereof, and a valve disk having a central cap portionprojecting upwardly therefrom to move through the open end Wall of thevalve casing, said cap portion of the valve disk being looselypositioned on the end of the valve stem the )arts bein constructedWhereb I to permit relative rocking movement and prevent rotarymovementv between the valve disk and valve stem, saidvalve casing havingan auxiliary valve seat intermediate its ends, a valve disk to engagethe last mentioned seat, and an adjustable connection be- G. L.HABERLIN, C. L. WRIGHT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

